Institute Newton C. Braga

Circuit Bench

Shield Timed Horn (CB18976E)
A pulse triggers this 800 Hz horn for a time determined by capacitor C1. Powered by 5 V the...
15 V x 2A regulator (CB15969E)
This circuit is suggested by Motorola and is based on a 1723 voltage regulator. The 2N3055...
CMOS Alarm (CB4803E)
This circuit is from Popular Electronics of the 90's. It makes use of NO and NC sensors. The relay...